Rufous-booted Racket-tail vs Mountain Avocetbill
Ocreatus addae so với Opisthoprora euryptera
Side-by-Side Comparison
| Thuộc Tính | Rufous-booted Racket-tail | Mountain Avocetbill |
|---|---|---|
| Tên Khoa Học | Ocreatus addae | Opisthoprora euryptera |
| Bộ | Caprimulgiformes | Caprimulgiformes |
| Họ | Trochilidae | Trochilidae |
| Tình Trạng Bảo Tồn | Not Evaluated | Least Concern |
| Chiều Dài | — | — |
| Chiều Dài Sải Cánh | — | 12,6 cm (5.0 in) |
| Khối Lượng | 3,0 g (0.11 oz) | 6,4 g (0.23 oz) |
| Chế Độ Ăn | Nectarivore of Bolivian and Peruvian cloud forest; visits Ericaceae and bromeliads. Gleans small insects from … | Nectarivore of high montane forest; upturned bill tip accesses pendant epiphyte flowers. Gleans small insects … |
| Số Trứng | 2 | 2 |
| Population Trend | — | — |
Habitat Comparison
Môi Trường Sống Chung
Không
Rufous-booted Racket-tail only
Mountain Avocetbill only
Song & Call Comparison
Rufous-booted Racket-tail
Deep, resonant hum barely audible; extremely low vibration barely perceptible during hovering near high-altitude flowers.
Mountain Avocetbill
Thin, high-pitched twittering; delicate cascade of light notes with silvery quality delivered during aerial foraging.
Geographic Range & Migration
Rufous-booted Racket-tail
Found in cloud forests of northern Bolivia and adjacent Peru and Brazil at 400–1,400 m elevation.
Mountain Avocetbill
Found on both Andean slopes in Colombia and Ecuador in cloud forest at 2,000–3,200 m elevation. Uncommon.
Tình Trạng Bảo Tồn
Rufous-booted Racket-tail
Mountain Avocetbill
How to Tell Them Apart
Rufous-booted Racket-tail
Golden-bellied Starfrontlet: tiny; males with brilliant orange-gold belly; violet gorget; females green above; spotted buff below
Mountain Avocetbill
Cozumel Emerald: tiny; males with glittering magenta gorget; metallic green above; white underparts; females green above; spots
About These Birds
Rufous-booted Racket-tail
A small hummingbird (8-10 cm plus tail rackets) found in Andean cloud forests of southeastern Peru and Bolivia at 1,200-2,200 m. Males have rufous leg puffs instead of white. Recently split from Booted Racket-tail. Nectarivore of montane forest undergrowth.
Mountain Avocetbill
A small hummingbird (10-11 cm) with a distinctive upturned bill tip, unique among hummingbirds. Green plumage. Found in Andean cloud forests from Colombia to Bolivia at 2,400-3,500 m. Nectarivore specializing in pendant flowers. The only member of its genus.